Peanut butter gelato (Gelato Messina)

Peanut butter

• 150 g roasted salted peanuts
• 30 g peanut oil, to taste

Peanut butter gelato

• 650 g full cream milk
• 140 g caster sugar
• 50 g skim milk powder

Peanut bark

• 50 g roasted salted peanuts
• 150 g dark chocolate chips